A tactile membrane switch embeds a metal elastic dome or silicone rubber keypad combined with conductive carbon pills molding into keys or buttons appropriate elastic response. As plastic overlay for this membrane switch, under this top overlay , there is many metal domes to enhance its tactile properties for its keys or buttons. These domes can be made of conductive materials, maybe it is designed into arch with four feet so that being convenient for user to press down. When user press down one dome, Dome contact with underneath circuit layer, close electric circuit. Release the dome, circuit disconnected. By dome’s tactile property, it will control circuit connection and disconnection completely. In most applications for membrane switch field, such tactile membrane switch is most !
Tactile membrane switch has a good tacticle feeling
Metal Domes and PET and PC overlay
PET and PC overlay , underneath which, embeded elastic metal domes,when you press these buttons on this layer, you can have a good elastic feeling. But the top layer is decoration layer, on which, custom pattern, number, letters and screen printing method. At last it is pressed by heat and become arc shaped decoration overlay !
The ideal overlay thickness for a membrane switch is between.006 and.010 for optimum tactile feedback. These thickness levels have the strength to satisfy your needs and the sensitivity to offer a high-quality tactile experience.
They are typically made of stainless steel with nickel-, silver-, or gold-plated metal domes. The chosen plating is determined by the switch’s conductivity requirements, which are based on electrical resistance. Nickel serves as the benchmark, while gold reduces resistance. The majority of metal-plated domes are used with screen-printed silver circuitry. Usually, only copper flex or PCBA-based designs get gold plating.
The requirement to match the material of the underlying circuit can also influence the plating choice. As an illustration, gold on gold is a popular strategy to enhance electricity conductive. This type tactile membrane switch realize its tacticle properties by metal tactile dome.
Assembly for Tactile Membrane Switches, Metal domes is available in many dimensions and forms, with actuation forces ranging from 180 to 700 grams. The most typical weight is 340 grams.
Silicone rubber keypad with Rear back conductive carbon pill
A layer of silicone rubber keypad is made with designated mold, on which, pattern, letter, and number is screen printed. Therefore, at the back side of these buttons, there are many conductive carbon pills. This will form into a single dome conductive layer. Add lower conductive layer, that is PCB or FPC printed circuit. Same to the dome and PET and PC overlay functions.
This silicone rubber keypad is very soft and elastic, it is so softer than metal dome. such designed overlay is also for tacticle membrane switch’s selection. For example, TV remote controller, Interphone, Caculator and Inspection and testing equipments, these will use silicone rubber keypad overlay largely.
In Summary, No matter the upper circuit layer is plastic and metal domes together or rubber keys and buttons control panel, they must put on the flexiable circuit board or Rigid PCB assembly board. And work with them togehter ! that is a finished tactile membran swith !
Luphi is an expert in the manufacture of membrane switches and membrane keypad for over 15 years, we can provide you with a human & computer interface solution, contact us today!
Membrane switches operate all sorts of products,from household appliances to industrial and medical equipment.Manufacturer produces quality membrane switches and touchscreen panels in a variety of sizes,designs, and functions. Please visit our factory and see how things operate here!
LuphiTouch,a professional OEM manufacturer of user interface subassembly products.LuphiTouch is located in south of China in Dongguan,and since 2008 the core of its business is manufacturing an export of membrane switches & keypads, capacitive switches, silicone Rubbert keypads, graphic overlays, and touchscreen panels. Besides,they also offer mechanical design and PCBA development, as well as development of single-chip solutions, Keypad Backlighting Solutions, and turnkey assembly.
The production of high-tech interface products requires clean and well functioning operations.let's get to know that how LuPhi complies with industry requirements.
The factory has many strengths-we use high quality imported raw materials and have a skillful team of workers,as well as modern production and testing equipment,our facility is certified with ISO 9001,medical ISO13485,environmental ISO14001,health and safety ISO45001, and the production areas are equipped with 10000 and 1000 class cleanrooms.our products obtain main quality certificates for major markets, such as Europe,North America and Australia.
